Reutilização do resíduo oriundo de serviços de restauração asfáltica em sua forma natural e com adições como alternativa de base e sub-base de pavimentos

Abstract

The highway network has an extension of more than 212,000 km paved. These roads have a lifespan of 10 to 20 years and require periodic maintenance. The milling of asphalt pavements is one of the techniques consistently applied in the maintenance and restoration of the road system process. Milling involves the removal of old coating and the resulting material is usually discarded, one of the major pollutants from maintenance works. There are studies to reuse this material works as follows: a layer of bearing base and / or sub-bases. With this process of recycling is possible to mitigate the impact to the environment. Therefore, this study evaluated the addition to simple compression of the milled material with binders for the application of base and sub-base pavement. The tests were performed at the Laboratory of Geotechnical and Pavement and Materials Laboratory Construction, both the Federal University of Pampa - Campus Alegrete. The milled material is from a stretch of the BR-290 near the city of Rosario do Sul and were molded cylindrical specimens with dimensions 10 x 20 cm to perform the test of compressive strength. The additions were made at different levels. From the results set the mixture with highest resistance, consisting of 80% milled 20% stone powder, 10% of rice hull silica and 5% hydraulic lime.